57179 Smith & Wesson N Frame Model 57 Thumb Piece & Nut Blue Steel .41 Magnum Used N197 Function: Trigger return mechanism

Function: Trigger return mechanism

No Magazine Safety: Allows firing without magazine inserted

Responsible for striker movement to fire the handgun

Model Caliber Size Compatible M&P 9 M2

both generations share barrel compatibility for the full-size models

57179 Smith & Wesson N Frame Model 57 Thumb Piece & Nut Blue Steel .41 Magnum Used N197 Function: Trigger return mechanismPart# 57179 Smith & Wesson N Frame Model 57 Thumb Piece & Nut . 41 Magnum Blue Steel Old Style Used Part We sell used, new & new old stock Smith & Wesson double action revolver parts. Shoot us an email or give us a call for all your S&W Gun needs! USA Guns And Gear How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957 58. So if